Hello Everyone,
I am used to this problem since Catalina, then on Big Sur. But I ended up doing the last Big Sur update (don't ask me why...)... So my mac is randomly shutting down again... I tried the solutions you provided but at the last step I have a problem.
When I type : bless --folder /Volumes/Macintosh\ HD/System/Library/CoreServices --bootefi --create-snapshot
It results in : Can't determine mount point of '/Volumes/Macintosh HD/System/Library/CoreServices' and ' '.
Could anyone help me ?
Thanks